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Materials with an intrinsic (ultra)low lattice thermal conductivity (kL) are critically important for the development of efficient energy conversion devices. In the present work, we have investigated microscopic origins of low kL behavior in BaO, BaS, and MgTe by exploring lattice dynamics and phonon transport of 16 isostructural MX (M = Mg, Ca, Sr, and Ba and X = O, S, Se, and Te) compounds in the rocksalt (NaCl)-type structure. Anomalous trends are observed for kL in MX (M = Mg, Ca, Sr, and...
Lowoutput power, intricatedevicedesigns, limitationon scalability, limitedproductioncapability,andhigherfabricationcostarethe major hurdles touse triboelectricnanogenerators (TENGs) as apower source in self-powered device applications. This work reports a high performance, simple design, and inexpensive TENG using overhead projector (OHP) sheets andZnOnanosheet arrayfilms.The fabricated TENGproducedamaximumoutputvoltage,current,andpowerdensityof ∼292V, ∼55μA, and∼424.8mW/m2 for e...
Energy harvesting from the ambient environment can be a beneficial and promising source for powering micro- and nanodevices. Triboelectric nanogenerator (TENG) technology has been proved to be a simple and cost-effective method to harness ambient mechanical energy. The performance of the TENG device mainly depends on the careful selection of the material pair. So far, metals and polymer materials have dominated TENG technology. Recently, there have been few reports on metal–organic framework ...
Theminuscule sizes of one-dimensional (1D)nanostructures have revolutionizedphotonic circuitry and led to efficientoptoelectronicdeviceswithunprecedentedspeed.Withtheimpressiveprogressaccomplishedinconsiderationofpressing challenges, perovskitematerialshavebeen in the spotlight inresearch.The low-dimensional perovskites (especiallynanowires) supersedetheirbulkcounterpartswithremarkableoptoelectronicpropertiesthatmakethemsuitabletobeusedinabroadrangeof applications.Nevertheless, forrea...
In this report, energy harvesting properties of Nafion films were investigated using piezoionic generator (PIOG) and triboelectric generator (TEG) devices. Nafion films were prepared by simple doctor blade deposition of a Nafion ionomer solution onto the aluminum electrode. The Nafion films were characterized for their surface morphology, composition, and crystallinity. Furthermore, the Nafion film exhibited strong substrate adhesion, a smooth surface, and amorphous nature. The deposited Nafi...
In this report, a triboelectric nanogenerator is fabricated using parafilm, polydimethylsiloxane (PDMS) films for the first time. The fabricated TENG has been used for low-frequency mechanical energy harvesting to drive wearable and low-power electronic gadgets. The parafilm and PDMS layers act as triboelectric layers, and packaging aluminium foil acts as conducting electrodes. A flexible TENG with a dimension of 5 x 5 cm2 generated an output voltage ~ 8 V and output power of 20.25 μW at the ...
As people became more aware of environmental issues, several designs of triboelectric energy harvesters based on biocompatible and eco-friendly natural materials have been developed in recent years. This manuscript reports a plant-based green triboelectric nanogenerator using extracted leaf powder of the Rumex vesicarius plant and PET as triboelectric layers. When hand-tapped, the developed TENG generated an open-circuit voltage ( ) of 3.86 V, and a short-circuit current ( ) of 3. , respec...
The development of triboelectric nanogenerators (TENGs) based on inexpensive inorganic materials has attracted significant attention to envisage next-generation self-powered electronic devices and sensors. In this research work, the fabrication of a triboelectric nanogenerator (TENG) based on ZnS nanosheets arrays was investigated for the first time. This TENG was fabricated with ZnS nanosheets films, polydimethylsiloxane (PDMS) as active tribo-layers. The originality of this work lies in the...
The exploration of new triboelectric materials is considered a significant research area to reduce the cost and complexity of the triboelectric nanogenerator (TENG) device and improve its energy conversion efficiency. In this report, a new triboelectric material pair has been demonstrated to prepare an inexpensive and high-performance TENG. A low-cost hot plate-assisted hydrothermal process is used to prepare the ZnO nanosheets on an aluminum substrate. TENG is made using ZnO nanosheet film, ...
For the first time, single-step fabrication of two-dimensional nanosheets of zinc sulfide (ZnS) was achieved employing flexible aluminum (Al) foil substrate using hydrothermal technique at 140 °C for ∼4 h. Indium doped Tin Oxide (ITO) coated on PET (Polyethylene Terephthalate) substrate and ZnS deposited Al foil as a top and bottom electrodes were used to fabricate a piezoelectric device. To generate an electric potential, the top ITO electrode was tapped on the ZnS nanosheets. The open-circu...
Indium tin oxide (ITO) is a ubiquitous transparent conducting oxide employed in several modern optoelectronic devices. However, due to limited availability and fast depletion of indium, there is an urge to supplement its use with suitable alternatives in appropriate sheet resistance range, depending on the application requirement. In this scenario, an alternative flexible transparent conducting Au/Pt/Au ultrathin metallic tri-layer electrode sputter-deposited on PET substrate is explored. The...
In a competitive electricity market Generating Companies or suppliers participate in the bidding process in order to get maximum profit. Therefore, each supplier will bid strategically for choosing the bidding coefficients to counter the competitors bidding strategy. In this paper bidding strategy problem is modeled as an optimization problem and solved using a novel algorithm based on Differential Evolution (DE). It is a population based stochastic optimization algorithm that searches the so...
In this paper, a new routing protocol for heterogeneous networks with improved clustering strategies has been developed. Energy Efficient Stable Election Protocol(EE-SEP) is proposed which has the impact on network lifetime, network stability and cluster heads formation in every round. Simulation results show that the proposed algorithm outperformed SEP and Low Energy Adaptive Clustering Hierarchy (LEACH) in all the factors considered when two different topologies with advanced nodes and thei...
Materials with long afterglow (LAG) became very renowned in the field of luminescence due to their high ability to store energy. However, the development of LAG phosphors is mostly dependent on rare-earth activators, which are commercially expensive due to their limited availability across the world. On the other hand, LAG phosphors that are not based on rare-earth and are developed as an alternative cannot compete with existing rare-earth LAG phosphors. Copper-doped zinc sulfide (ZnS:Cu)...
This research work presents the development of a triboelectric nanogenerator (TENG) devices utilizing a ZIF-67/PVDF hybrid film and FEP as frictional layers. The ZIF-67/PVDF film was prepared using a solution casting method and exhibited high crystallinity as confirmed by XRD. The average particle size of ZIF-67 powder was found ~ 250 nm. Morphological studies by SEM confirms the incorporation of ZIF-67 in PVDF film. Notably, the incorporation of ZIF-67 particles resulted in an enhanced β-pha...
Exploring different types of materials in triboelectric nanogenerator (TENG) research remains a dynamic and evolving field. This work marks an important milestone in this journey by introducing phosphor material, particularly zinc vanadate (Zn3V2O8, ZVO), into TENG technology for the first time. TENG uses ZVO and silicone films as active triboelectric layers. The fabricated TENG exhibits remarkable performance, producing an output voltage of 515 V and a current of 178 μA, resulting in an impr...
Materials with an extreme lattice thermal conductivity (κl) are indispensable for thermal energy management applications. Layered materials provide an avenue for designing such functional materials due to their intrinsic bonding heterogeneity. Therefore, a microscopic understanding of the crystal structure, bonding, anharmonic lattice dynamics, and phonon transport properties is critically important for layered materials. Alkaline-earth halofluorides exhibit anisotropy from their layered crys...
Lattice thermal conductivity (κL) is of great scientific interest for the development of efficient energy conversion technologies. Therefore, microscopic understanding of phonon transport is critically important for designing functional materials. In our previous study (Roshan et al., ACS Applied Energy Mater. 2021, 5, 882–896), anomalous κL trends were predicted for rocksalt alkaline-earth chalcogenides (AECs). In the present work, we extended it to alkali halides (AHs) and conducted a thoro...
Nanogenerator (NG) is a potential technology that allows to build self-powered systems, sensors, flexible and portable electronics in the current Internet of Things (IoT) generation. Nanogenerators include piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs), convert different forms of mechanical motion into useful electrical signals. They have evolved and expanded their applications in various fields since their discovery in 2006 and 2012. Material selection is...
Latent fingerprint (LFP) imaging is critical for crime scene detection and personal data recognition. In law enforcement applications, there is a great need for new materials that are affordable, environmentally friendly, and extremely sensitive. Here, a dual excitable and intense red-emitting oxide-based nanophosphor, Y2SrZnO5:xEu3+ (x = 0–0.4 mol), was successfully synthesized by a self-igniting combustion technique. The phase purity, crystal structure, and lattice parameters were character...
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